The image display apparatus includes an optical system causing a light flux entering from an original image by being transmitted through a fifth surface to reflect at a fourth surface, a third surface, a first surface and a second surface and then cause the light flux to be transmitted through the first surface and exit toward an exit pupil, causing the light flux to form an intermediate image and causing optical paths to intersect with each other. The optical system satisfies 0.62≦L12/f≦5.00 and 1.80≦L45/L12≦5.00. When a distance between hit points of a central-view-angle principal ray on the surfaces is referred to as a hit point distance, L45 represents a hit point distance between the fourth and fifth surfaces, L12 represents a hit point distance between the first and second surfaces, and f represents a focal length of the optical system.
Legal claims defining the scope of protection, as filed with the USPTO.
3. An image display apparatus according to claim 1 , wherein the second surface has a positive optical power.
4. An image display apparatus according to claim 1 , wherein at least one of the first to fifth surfaces is a rotationally asymmetric surface.
5. An image display apparatus according to claim 1 , wherein the first surface causes the light flux from the third surface to be internally totally reflected and causes the light flux from the second surface to be transmitted without causing the light flux to be internally totally reflected.
6. An image display apparatus according to claim 1 , wherein an angle of view of the display optical system is 50° or larger.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
July 19, 2016
October 24, 2017
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